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Title: Lack of hepatic response of microRNA in mice following DB[a,h]A exposure (Agilent miRNA)      
dateReleased:
07-02-2013
description:
Dibenzo[a,h]anthracene DB[a,h]A is a polycyclic aromatic hydrocarbon potent carcinogen. Few studies have investigated the role of DB[a,h]A on mRNA and miRNA expression. In this study a 10-week old male MutaTM Mouse were exposed to 6.25, 12.5, and 25 mg/kg/day DB[a,h]A by oral gavage for 28 consecutive days. DNA adducts were detected in the livers at each DB[a,h]A dose tested, and a dose-dependent increase in lacZ mutants was observed in the same samples. MAANOVA analysis revealed minor changes in the mRNA expression for the two lowest doses. Differential expression of 19 up-regulated and 22 down-regulated transcripts with fold-change > 1.5 (FDR-adjusted P < 0.05) were identified in the 6.25 mg/kg/day DB[a,h]A treatment group. For the 12.5 mg/kg/day treatment group 13 transcripts were up-regulated and 32 down-regulated (FDR-adjusted P < 0.05 and fold-change > 1.5). Major effect on mRNA expression resulted from exposure to the highest dose (25 mg/kg/day) of DB[a,h]A with 135 up-regulated and 104 down-regulated genes with fold-change > 1.5 (FDR-adjusted P < 0.05). The significantly regulated genes are involved in circadian rhythm, drug metabolism, glucose metabolism, cholestrol and lipid metabolism, immune response, cell cycle, and apoptosis. We also investigated miRNA response to the three doses of DB[a,h]A. MiRNA expression was relatively unaffected. Only miR-34a showed significant (FDR-adjusted P < 0.05) up-regulation with a fold change above 1.3-fold. RNA samples from 5 control and 4-5 mice per treatment group (6.25mg/kg, 12.50mg/kg, and 25mg/kg) containing 100 ng were labelled using Agilent’s miRNA complete labelling and Hyb Kit (Agilent Tech, Mississauga, ON, Canada).
privacy:
not applicable
aggregation:
instance of dataset
ID:
E-GEOD-35195
refinement:
raw
alternateIdentifiers:
35195
keywords:
functional genomics
dateModified:
06-02-2014
availability:
available
types:
gene expression
name:
Mus musculus
ID:
A-GEOD-14972
name:
Agilent-029152 Unrestricted Mouse miRNA v15.0 Microarray 028772 (miRBase release 15.0 miRNA ID version)
accessURL: https://www.ebi.ac.uk/arrayexpress/files/E-GEOD-35195/E-GEOD-35195.raw.1.zip
storedIn:
ArrayExpress
qualifier:
gzip compressed
format:
TXT
accessType:
download
authentication:
none
authorization:
none
accessURL: https://www.ebi.ac.uk/arrayexpress/files/E-GEOD-35195/E-GEOD-35195.processed.1.zip
storedIn:
ArrayExpress
qualifier:
gzip compressed
format:
TXT
accessType:
download
authentication:
none
authorization:
none
accessURL: https://www.ncbi.nlm.nih.gov/geo/query/acc.cgi?acc=GSE35195
storedIn:
Gene Expression Omnibus
qualifier:
not compressed
format:
HTML
accessType:
landing page
primary:
true
authentication:
none
authorization:
none
abbreviation:
EBI
homePage: http://www.ebi.ac.uk/
ID:
SCR:004727
name:
European Bioinformatics Institute
homePage: https://www.ebi.ac.uk/arrayexpress/
ID:
SCR:002964
name:
ArrayExpress

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